CN104768441B - Detect plugged filter - Google Patents
Detect plugged filter Download PDFInfo
- Publication number
- CN104768441B CN104768441B CN201280076924.9A CN201280076924A CN104768441B CN 104768441 B CN104768441 B CN 104768441B CN 201280076924 A CN201280076924 A CN 201280076924A CN 104768441 B CN104768441 B CN 104768441B
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- China
- Prior art keywords
- dish
- filter
- electric current
- washing machine
- draining pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4202—Water filter means or strainers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0049—Detection or prevention of malfunction, including accident prevention
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4202—Water filter means or strainers
- A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/08—Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/26—Indication or alarm to the controlling device or to the user
Landscapes
- Washing And Drying Of Tableware (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The present invention relates to a kind of method and apparatus blocked for Filter for dish-washing machine.The device is arranged to discharge the processing water of the dish-washing machine, measure the operation electric current of a motor for driving dish washing-machine water-draining pump and determine whether the Filter for dish-washing machine is blocked based on measured draining pump motor operation electric current.
Description
Technical field
The present invention relates to a kind of method and apparatus blocked for Filter for dish-washing machine.
Background
Dish-washing machine include in the bottom of washing compartment filter for from by means of circulating pump in dish-washing machine again
The processing of cycle is with filtering out dirt in water.It is that processing dirty in order to prevent is recycled and has been ejected into water to carry out this content
On article to be washed.When excessive dirt is attached on filter, which becomes to block and final water will not
Across the filter.Accordingly, it may be desirable to be detection plugged filter so that the filter can be cleaned so that dish-washing machine
Reach its complete washability.
The international patent application of Publication No. WO 2005/089621 discloses a kind of dish-washing machine and one kind for controlling this
The method of dish-washing machine, wherein the electric current taken by detecting the circulating pump of the dish-washing machine causes scourability negative shadow to identify
Loud effect (such as plugged filter).The shortcomings that method illustrated in WO2005/089621, is that detection circulating pump is taken
Electric current may about filter whether be blocked make erroneous decision；The small of load on circulating pump may also only wash the dishes less
Processing water consumption in the washing compartment of machine is insufficient as a result, the processing water of too small amounts will be in dish-washing machine in this case
Cycle, so as to cause the processing water flow across circulating pump low.Therefore, the magnitude of current that circulating pump is taken may be actually
Problem indicates plugged filter when being the processing water consumption deficiency that washing compartment contains, this is very undesirable.
It summarizes
It is an object of the invention to solve the problems, such as or at least alleviate in this field this and improved filter is provided
Jam detection.
This purpose the first aspect of the present invention be by it is a kind of for detect Filter for dish-washing machine block device come
Reach.The device is arranged to the horse for discharging the processing water of the dish-washing machine, measuring a driving dish washing-machine water-draining pump
The operation electric current that reaches and determine whether the Filter for dish-washing machine is blocked based on measured draining pump motor operation electric current
Plug.
This purpose is to be reached by a kind of for detecting the method that Filter for dish-washing machine blocks in the second aspect of the present invention
It arrives.This method includes the following steps：It discharges the processing water of the dish-washing machine and measures the horse of the driving dish washing-machine water-draining pump
The operation electric current reached.Further, this method includes the following steps：It is determined based on measured draining pump motor operation electric current
The Filter for dish-washing machine.
Therefore, the load of the draining pump is determined by the operation electric current for the motor for measuring the driving draining pump.This may
Easily measured indirectly by measuring in motor the voltage of known shunt resistance device and calculating electric current using Ohm's law.Institute
The electric current of measurement can be converted directly to draining pump torque；Torque is higher, and the operation electric current for driving the motor of the pump is higher,
And higher pump torque means that the processing of greater flow flows through the draining pump with water.With using relatively expensive pressure sensing
Device compares come the flow measured across the processing water of pump, and it is advantageous in itself to measure draining pump motor operation electric current
's.Utilize measured operation electric current, it may be determined that whether the Filter for dish-washing machine is blocked.If for example, when washing compartment
After draining in contrast operation electric current does not reach a certain predeterminated level immediately, then can be inferred that the processing use across draining pump
Water flow is low and the filter is blocked.
As mentioned before, the operation electric current of the circulating pump with using dish-washing machine determines compared with plugged filter,
It is an advantage of the present invention that in prior art plugged filter detection method, the load reduction on circulating pump may also only be
Processing water consumption in the washing compartment of dish-washing machine is insufficient as a result, the processing water of too small amounts will wash the dishes in this case
It is recycled in machine, low so as to cause the processing water flow across circulating pump, this is unrelated with plugged filter.Therefore, the prior art
Choke detecting method may indicate plugged filter when problem is actually and washs every indoor processing water consumption deficiency.So
And by the present invention, except non-filter is blocked, a small amount of processing water otherwise washed in compartment will still cause appropriate amount
Processing passes through draining pump with water.
At one of the present invention hereinbefore in embodiment illustrated, when determining whether Filter for dish-washing machine is blocked
When, measured draining pump motor operation electric current is compared with the first predetermined current threshold, if wherein measured electricity
Stream is less than first predetermined current threshold, then it is assumed that filter is blocked.Therefore, if the flow of processing water is low so as to indicate
Filter is blocked, then will reduce draining pump load.Therefore, by suitably setting and measured draining pump motor operation electric current
The first current threshold being compared, it may be determined that whether filter is blocked.In this particular embodiment, it is if measured
In contrast electric current does not reach first threshold level immediately, it is determined that filter is blocked.
In the further embodiment of the present invention, when determining whether Filter for dish-washing machine is blocked, from draining
After starting one section of predetermined period, measured draining pump motor operation electric current is compared with the second predetermined current threshold.Such as
Fruit predetermined period electric current measured after passing by is higher than second predetermined current threshold, then it is assumed that filter is blocked.Cause
This, if having pass by post processing in the period of suitably setting still flows (although with low flow velocity) with water, can be inferred that
Filter is blocked.
In another embodiment, when determining whether Filter for dish-washing machine is blocked, in scheduled averaging period
It is interior that multiple measured draining pump motor operation electric current values are averaging.If the average operating current of gained is average less than predetermined
Current threshold, then it is assumed that filter is blocked.Advantageously, if this specific embodiment eliminate flow across draining pump due to
Certain reason and when uneven and/or fluctuation, makes the risk of erroneous decision about plugged filter.
Statement " processing water " as used herein refers to a kind of main liquid for including water, which is used in dish-washing machine
And it is recycled wherein.The processing is the water that can include different amounts of detergent and/or rinse aid with water.The processing
Dirt, such as swill or other kinds of solid particle and the liquid or compound of dissolving are may also contain with water.
The processing used in main wash cycle is sometimes referred to as wash liquid with water.The processing used in rinse cycle with water sometimes by
Referred to as hot washings or hot washings, this depends on the temperature of the rinse cycle.
It should be noted that all possible combinations the present invention relates to the feature stated in detail in the claims.Learning
The appended claims and following when illustrating, other feature and advantage of the invention will be apparent.Those skilled in the art
It recognizes, different characteristic of the invention may be combined to produce other implementations in addition to embodiment described below
Example.
Brief Description Of Drawings
The present invention is described by reference to attached drawing by way of example now, in the accompanying drawings：
Fig. 1 is shown can be wherein using the prior art dish-washing machine of the present invention；And
Fig. 2 shows flow charts, illustrate the method according to an embodiment of the invention for being used to detect dish-washing machine blocking.
It is described in detail
The present invention is described more fully hereinafter with now with reference to these attached drawings, the invention is shown in the accompanying drawings certain
A little embodiments.However, the present invention can implement and should not be construed as limited to described here in many different manners
Embodiment；But these embodiments are provided by way of example so that present disclosure will be thorough and complete and will
The scope of the present invention is given expression to completely to those skilled in the art.
Fig. 1 shows the dish-washing machine 10 that can be implemented within the present invention.It should be noted that dish-washing machine can be rendered as being permitted
It is multi-form and including many different functionality.Therefore, the difference of the present invention is explained using dish-washing machine shown in Fig. 1 10
Embodiment and the example that should be only seen as applying the dish-washing machine of the application wherein.Dish-washing machine 10 is washed including one
Wash compartment or washing tube 11, the washing compartment or washing tube accommodate for accommodate article to be washed lay up 12, it is intermediate
Basket 13 and lower basket 14.Typically, cutlery, which is accommodated in, lays up in 12, and during plate, drinking glass, pallet etc. are placed in
Between in basket 13 and lower basket 14.
User is by the detergent input of liquid, powder or tablet form on the door (not shown) inside of dish-washing machine 10
Detergent compartment in, according to selected washing procedure, the detergent be controllably devoted to washing compartment 11
It is interior.The operation of dish-washing machine 10 is usually controlled by the processing unit 40 for performing appropriate software.
Fresh water is supplied to washing compartment 11 by water inlet 15 and feed water valve 16.It is so-called that this fresh water is finally collected in
Lower Hold 17 in, in the Lower Hold, fresh water is mixed with the detergent launched, so as to generate processing water 18.Washing every
The bottom of room is filter 19, for before processing water leaves the compartment through processing water out 20 from processing water mistake
Filter dirt (then to reenter washing compartment 11 by circulating pump 21).Therefore, processing passes through filter 19 with water 18
And it is pumped across circulating pump 21 (circulating pump is usually driven by brushless direct-current (BLDC) motor 22), by conduit 23 and right
The processing answered water valve 24,25 and via the nozzle to the associated corresponding washing arm 26,27,28 of each basket 12,13,14
(not shown) is injected into washing compartment 11.Therefore, processing water 18 leaves washing compartment 11 via filter 19 and passes through
It is recycled by circulating pump 21 and is sprayed via the nozzle of upper wash arm 26, intermediate washings arm 27 and lower wash arm 28
To being contained on the article for needing to be washed in corresponding basket.
Now, the filter 19 in the Lower Hold 17 at the bottom of washing compartment 11 is once in a while since processing is in water 18
Excessive dirt and be blocked, so as to cause dish-washing machine 10 washability be deteriorated.It is therefore desirable to detect it is this block so that
The filter can be cleaned so that dish-washing machine reaches its complete washability by obtaining user.
In an embodiment of the invention, the processing of dish-washing machine 10 is discharged by using the draining pump 29 that BLDC motors 30 drive
Plugged filter is detected with water 18.It should be noted that it is contemplated that draining pump 29 and circulating pump 21 can be by same horses
Up to driving.When carrying out draining to dish-washing machine 10, feed water valve 16 is turned off to prevent fresh water from entering the dish-washing machine.Now, when
When carrying out draining to the dish-washing machine, the load of draining pump 29 is recorded.In fact, this is carried out as follows：Measure draining pump 29
The operation voltage and calculating operation electric current of known shunt resistance device in motor 30.Filter is determined from measured electric current
Whether 19 be blocked.For example, as before by discussion, measured draining pump motor operation electric current and predetermined threshold are carried out
Compare, and if measured electric current do not drop within the given time passed through since draining the predetermined threshold with
Under, then it is assumed that filter 18 is blocked.Therefore, if in fact, measured electric current does not drop within the given several seconds
Zero or close to zero level, then water still flow through draining pump 29, the flow velocity rate which imply water is low and therefore 18 quilt of filter
It blocks.If filter is not blocked, processing will freely be flowed out drain port 31 and be discharged in a few seconds with water washes the dishes
In machine 31, and therefore, motor 30 will take few electric current or not take electric current.
In an embodiment of the invention, such as by the diode 32 in dish-washing machine shell with visual manner or pass through
Sound indicates that filter 19 is blocked in a manner of hearing to the user of dish-washing machine 10.Then, user can clean this
Filter.
Dish-washing machine 10, control is controlled to pass through circulating pump 21 and draining pump in terms of the selected washing procedure of user is supervised
29 pairs handle the cycle carried out with water 18 and discharge, putting detergent, the rotation for realizing washing arm 26,27,28, control water valve
16th, 24,25 etc. actuating and according to the method for the present invention different embodiments detection filter 18 whether be blocked, be by
Processing unit 40 by driving device (such as two BLDC motors 22,30) and by be further used to open detergent every
Room, activates the mechanical structure (not shown) of water valve etc. to manage rotation washing arm.Therefore, processing unit 40 and dish-washing machine 10
In various hardware elements communication connection, such as the motor 30 of draining pump 29.Usually for example with the shape of one or more microprocessors
Formula implements the processing unit 40, which is arranged to be downloaded to and the microprocessor for performing
Computer program 42 in associated suitable storage medium 41 (such as RAM, flash memory or hard disk drive).Microprocessor
Device 40 be arranged to this include computer can perform component appropriate computer program 42 be downloaded to memory 41 and
Implement method according to an embodiment of the invention at least partly when being performed by the processing unit 40.Storage medium 41 can be packet
Include a kind of computer program product of computer program 42.Alternatively, computer program 42 can pass through suitable computer journey
Sequence product (such as memory stick) is even transferred into storage medium 41 by network.Microprocessor 40 can be alternatively with special
Integrated circuit (ASIC), field programmable gate array (FPGA), Complex Programmable Logic Devices (CPLD) form implement.
Fig. 2 shows flow charts, illustrate the method according to an embodiment of the invention for being used to detect dish-washing machine blocking.
In first step S101, processing unit 40 controls the motor 30 of the driving draining pump 29 to discharge the processing water of dish-washing machine 10
18.Hereafter, in step s 102, processing unit 40 measures the operation electric current of draining pump motor 30.Finally, in step s 103,
Processor 40 determines whether Filter for dish-washing machine 19 is blocked based on the operation electric current of measured draining pump motor 30.
In the further embodiment of the present invention, processing unit 40 is arranged to control the driving draining pump 29
Motor 30 rotary speed so that when discharge dish-washing machine 10 processing water 18 when, rotary speed is reduced to from nominal value
One rotary speed threshold value.This is favourable, because the sensitivity of 19 jam detection of filter is improved.When this is used to drive
(it is typically for during nominal wash cycle than such as from about 3000rpm when the motor 30 of draining pump 29 is run with datum speed
The rotary speed of draining is carried out to dish-washing machine), it is less likely to detect air in draining pump, this indicates plugged filters.
By the way that the rotary speed of motor 30 is reduced to about 1800rpm, it is easier to detect the variation of draining pump motor operation electric current, and
And processing unit 40 can determine whether filter 19 is blocked with higher accuracy.
It is washed it should be noted that the plugged filter detection carried out according to an embodiment of the invention is typically the normal of dish-washing machine
Wash a part for cycle.Typically, (dish-washing machine has discharged processing water at this time) implements according to this hair at the end of wash cycle
The plugged filter detection method of bright embodiment need not supply fresh water to dish-washing machine so that wash cycle is in mistake so as to have
The advantages of continuing after filter jam detection.If however, give the instruction that filter is blocked for some purposes,
It can implement plugged filter detection method according to an embodiment of the invention during normal wash cycle.It can even set
The individual short plugged filter detection program of operation is expected to test whether the filter of dish-washing machine is blocked.
Although describing the present invention with reference to the specific exemplary embodiment of the present invention, many different changes,
Modification etc. is all that those skilled in the art will be clear that.Therefore, these described embodiments are not intended to be limited to such as appended right
The scope of the present invention that claim is limited.
Claims (12)
1. a kind of for detecting the method for Filter for dish-washing machine blocking, this method includes the following steps：
Discharge the processing water of (S101) dish-washing machine；
Measure the operation electric current of the motor of (S102) driving dish washing-machine water-draining pump；And
Determine whether (S103) Filter for dish-washing machine is blocked based on measured draining pump motor operation electric current,
It is wherein described that step that whether Filter for dish-washing machine is blocked is determined based on measured draining pump motor operation electric current
Suddenly include：Measured draining pump motor operation electric current is compared with the first predetermined current threshold, if wherein measured
Electric current be less than the first scheduled current threshold, then it is assumed that the filter is blocked.
2. the method as described in claim 1 further comprises the steps：
When having pass by one section of predetermined period since draining, by measured draining pump motor current and the second scheduled current
Threshold value is compared, if wherein electric current measured after the predetermined period has been pass by is higher than the second scheduled current threshold
Value, then it is assumed that the filter is blocked.
3. the method as described in any one of claim 1 to 2, further comprises the steps：
The draining pump motor operation electric current value of multiple measurements is averaging within a scheduled averaging period, if wherein flat
Equal operation electric current is less than scheduled average current threshold value, then it is assumed that the filter is blocked.
4. the method as described in any one of claim 1 to 2, further comprises the steps：
The signal that the filter is blocked is sent out by an indicator of the dish-washing machine.
5. the method as described in any one of more than claim 1 to 2, further comprises the steps：
The rotary speed of the motor of the driving draining pump is controlled, so that when the processing water for discharging the dish-washing machine, the rotation
Speed is reduced to a rotary speed threshold value from nominal value.
6. one kind, for detecting the device (40) of Filter for dish-washing machine (19) blocking, described device is arranged to be used for：
The processing of the dish-washing machine is discharged with water (18)；
Measure the operation electric current of the motor (30) of a driving dish washing-machine water-draining pump (29)；And
Determine whether the Filter for dish-washing machine is blocked based on measured draining pump motor operation electric current,
The wherein device is arranged to determining the dish-washing machine based on measured draining pump motor (30) operation electric current
When whether filter (19) is blocked：
Measured draining pump motor operation electric current is compared with the first predetermined current threshold, if wherein measured electricity
Stream is less than first predetermined current threshold, then it is assumed that the filter is blocked.
7. device (40) as claimed in claim 6, the device are further arranged to：
When having pass by one section of predetermined period since draining, by measured draining pump motor (30) operation electric current and the
Two predetermined current thresholds are compared, if wherein electric current measured after the predetermined period has been pass by is second pre- higher than this
Constant current threshold value, then it is assumed that the filter (19) is blocked.
8. the device (40) as described in any one of claim 6 to 7, the device are further arranged to：
Draining pump motor (30) operation electric current value of multiple measurements is averaging within a scheduled averaging period, wherein such as
Fruit average operating current is less than scheduled average current threshold value, then it is assumed that the filter (19) is blocked.
9. the device (40) as described in any one of claim 6 to 7, the device are further arranged to：
The blocked signal of the filter (19) is sent out by an indicator (32) of the dish-washing machine (10).
10. the device (40) as described in any one of more than claim 6 to 7, the device are further arranged to：
The rotary speed of the motor (30) of the driving draining pump (29) is controlled, so that when the processing for discharging the dish-washing machine (10) is used
During water (18), which is reduced to a rotary speed threshold value from nominal value.
11. the device (40) as described in any one of claim 6 to 7, described device is the motor with the draining pump (29)
(30) processing unit of communication connection, the processing unit are used to measure the draining pump motor operation electric current and this is controlled to wash the dishes
The draining of machine.
12. a kind of dish-washing machine (10), which includes washing the dishes for detecting according to any one of claim 6 to 11
The device (40) that machine filter (19) blocks.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2012/072204 WO2014071981A1 (en) | 2012-11-08 | 2012-11-08 | Detecting filter clogging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104768441A CN104768441A (en) | 2015-07-08 |
| CN104768441B true CN104768441B (en) | 2018-07-03 |
Family
ID=47428560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280076924.9A Active CN104768441B (en) | 2012-11-08 | 2012-11-08 | Detect plugged filter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9872597B2 (en) |
| EP (1) | EP2916708B1 (en) |
| CN (1) | CN104768441B (en) |
| BR (1) | BR112015010393A2 (en) |
| PL (1) | PL2916708T3 (en) |
| WO (1) | WO2014071981A1 (en) |
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| KR102402029B1 (en) * | 2015-11-13 | 2022-05-26 | 삼성전자주식회사 | Dish washing machine and method of controlling the same |
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| WO2017140335A1 (en) * | 2016-02-15 | 2017-08-24 | Electrolux Appliances Aktiebolag | Process water flow detection in circulation pump |
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| CN113907667B (en) * | 2020-07-07 | 2024-05-14 | 宁波方太厨具有限公司 | Method for detecting and controlling blockage of dish-washing machine |
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- 2012-11-08 PL PL12805601T patent/PL2916708T3/en unknown
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150265128A1 (en) | 2015-09-24 |
| PL2916708T3 (en) | 2020-06-15 |
| EP2916708A1 (en) | 2015-09-16 |
| EP2916708B1 (en) | 2020-01-08 |
| US9872597B2 (en) | 2018-01-23 |
| BR112015010393A2 (en) | 2017-07-11 |
| CN104768441A (en) | 2015-07-08 |
| WO2014071981A1 (en) | 2014-05-15 |
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